This, presumably, is only part and I guess the remainder may have been an EPNS stand or support of some sort, since the curve on this little trough means it won't stand unaided. The glass body is c. 5.5" long, and the Rd. No. was first registered on 16th March 1892 - and oddly on the previous day another 'Marmalade' was registered under No. 189247 - maybe a sudden peak in a fashion for toast and marmalade
Would be interested to know what the other half looked like, so if anyone can point me at a pic or post one, I'd be grateful, and thanks for looking.
Ref. 'The Identification of English Pressed Glass' - Jenny Thompson.